Barrel for a barrel joint for parts of furniture and furnishing items

ABSTRACT

A barrel for a barrel joint for parts of furniture and furnishing items includes a hollow cylindrical body containing a blocking element and having at least one hole on one of its side surfaces for the passage of a tip of a tool that actuates the blocking element, the hollow cylindrical body also having at least another hole for receiving a pin of the barrel joint.

FIELD OF THE INVENTION

The present invention relates to a barrel for a barrel joint for partsof furniture and furnishing items.

BACKGROUND OF THE INVENTION

The joining between two panels, for example between a shoulder of apiece of furniture and a base, shelf or top, in the furniture andfurnishing industry, is currently effected by positioning a pin screwedinto a hole of the shoulder and a barrel inserted in a hole formed inthe base, shelf or top of the furniture.

In order to position the barrel in this way, a relatively wide hole mustbe produced in the base, shelf or top of the furniture, which receivesthe barrel that houses a grub screw in its threaded portion. The holethus produced must also be covered by a cap to restore the aestheticappearance of the parts involved. Furthermore, the barrel must not belonger than a certain size due to the thickness of the base, shelf ortop in which it is positioned.

FIGS. 1 to 5 show a known solution of this type designed for connectinga top 11 and/or a base 12 of a piece of furniture M and two sideshoulders 13 of the same to provide the desired joint.

In the known solution illustrated, horizontal holings 14 must beprovided, having a smaller size, produced in the shoulders 13, whichreceive a threaded end 15 of a pin 16. Vertical holings 17 must also beprovided, having a much larger size, produced in the visible part inboth the base or shelf 12 and in the top 11 of the furniture M, toreceive a barrel 19. Additional horizontal holings 20 must also beprovided, which intersect the above-mentioned vertical holes 17, toreceive the threaded end 15 of the pin 16.

It can be easily understood that the holings 17 that receive the barrel19 must also be covered by specific caps, not shown, in order to restorethe aesthetic appearance of the finished furniture.

The blockage of a joint of this type, after positioning the pins 16 inthe shoulders 13 and the barrels 19 in the base 12 or top 11, iseffected using a common screwdriver 21.

As shown in the figures in fact, it is necessary to act in the directionperpendicular to the joint as appears in the constraining and blockingphases illustrated in FIGS. 3 to 5. The screwdriver 21 passes into theholing 17, which is used for positioning the barrel 19, and blocks athreaded grub screw 22, screwing according to the arrow 23. It can infact be observed that the grub screw 22 is positioned in an internalthreading 24 of the barrel 19 which has an extremely short body and aconsiderable diameter. The cap (not shown) that covers the holing 17,once a stable joining between the parts has been obtained, consequentlyas the same large dimensions.

It should also be noted that a cap of this type is positioned on theupper surface of the base or shelf 12 thus creating an obstacle orsource of disturbance for possible objects that are arranged on thesame.

DE 3145825 describes a barrel for a barrel joint for parts of furnitureand furnishing items according to the preamble of claim 1.

DE 2748272, LU 37757 and EP 1469206 illustrate other examples of abarrel for a barrel joint for parts of furniture and furnishing items.

SUMMARY OF THE INVENTION

The general objective of the present invention is therefore to provide abarrel for a barrel joint for parts of furniture and furnishing items,such as a shoulder, a base, a top and/or a shelf, capable of solving thedrawbacks of the known art indicated above in an extremely simple,economical and particularly functional manner.

A further objective of the present invention is therefore to provide abarrel for a barrel joint which, in addition to having minimumvisibility on the part of an observer, and consequently a highaesthetical value, can be accessible from at least two sides also in thecase of irremovable encumbrances positioned close to the base or shelf.

Another objective of the present invention is to provide a barrel for ajoint between parts of furniture and furnishing items that allowsinsertion in a thickness of the single panel, without weakening it.

BRIEF DESCRIPTION OF THE DRAWINGS

The structural and functional characteristics of the present inventionand its advantages with respect to the known art will appear even moreevident from the following description, referring to the enclosedschematic drawings, which show embodiment examples of the same inventionhaving the same innovative concept. In the drawings:

FIGS. 1 and 2 are respectively an exploded perspective view and anassembled view of a piece of furniture with barrels and pins of theknown art positioned between two shoulders of a piece of furnitureconnected by a base and by a top forming stable joints between theparts;

FIGS. 3 to 5 are sectional views of a barrel of the known art when it isconnected to a pin forming the joints of a piece of furnitureillustrated in the previous FIGS. 1 and 2;

FIGS. 6 and 7 are respectively an exploded perspective view and anassembled view of a piece of furniture with barrels according to thepresent invention connected to pins forming stable joints between theparts of two shoulders of a piece of furniture and a base and toprespectively;

FIGS. 8 to 10 are sectional views of a barrel according to the inventionwhen it is connected to a pin forming the joints illustrated in theprevious FIGS. 6 and 7;

FIGS. 11 to 13 are sectional views of a further barrel according to theinvention when it is connected to a pin forming the joints illustratedin the previous FIGS. 6 and 7;

FIGS. 14a to 16b are sectional views according to two perpendiculardirections of yet another barrel according to the invention when it isconnected to a pin forming the joints illustrated in the previous FIGS.6 and 7.

DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

With reference first of all to FIGS. 6 and 7, these show a piece offurniture M comprising a top 11 and a base or shelf 12 suitable forbeing positioned between two side shoulders 13 by means of a series offour joints which provide a barrel for a barrel joint for parts offurniture and furnishing items according to the present invention.

For the positioning of this type of barrel joint, which provides abarrel according to the present invention, vertical holings 25 areprovided, formed in the thickness of the shoulders 13, which receive abarrel 26, 126 according to the invention. Horizontal holings 27 mustalso be provided, having a much smaller size, also formed in thethickness in both the base or shelf 12 and in the top 11 of thefurniture M, for receiving a pin 15.

Additional horizontal holings 28 must also be provided in the shoulders13, which intersect the above-mentioned vertical holes 25, which areused for acting on a blocking element of the barrel joint. A blockingelement of this type can be produced by means of a simple grub screw 29(FIGS. 11 to 13) or by means of a blocking mechanism 30 (FIG. 8 to 10)or 230 (FIGS. 14a to 16b ) inside a barrel 26, 126, 226. Both the grubscrew 29 and the blocking mechanism 30, 230 are engaged in a part of thesame with a housing 31 present for this purpose on a pin 15, 215.

FIGS. 8 to 10 show a barrel 26 according to the invention in a similarbarrel joint.

The barrel 26 comprises a pair of half-shells 32, 33, that can becoupled with each other, to form a hollow cylindrical casing containingthe blocking mechanism 30. In particular, a grub screw 34, internallythreaded in 35 in a hole coaxial to the same, is caused to slide in partof said casing, which comprises the two half-shells 32, 33.

A bevel gear comprising a pinion 36 and a toothed crown 37 allows thetranslation of the grub screw 34. More specifically, the pinion 36 isrotatable inside a housing formed in the pair of half-shells 32, 33,whereas the toothed crown 37 is formed as the head of a threaded screw38 which is engaged in the internal threading 35 of the grub screw 34.The grub screw 34, as shown for example in the figures, can be providedwith blocking means against rotation which allow the translation of thesame grub screw 34, preventing its rotation. The means can consist, forexample, of radial protrusions 39 of the grub screw 34 which are coupledinside vertical complementary seats 40 formed in at least one of thehalf-shells 32, 33.

This blocking mechanism is driven from the outside by the star tip of ascrewdriver 21.

It should be noted that one of the half-shells, for example thatindicated with 33, provides, on the side surface, a side hole 41 foraccess inside the casing 32, 33. The tip of the screwdriver 21 is passedfrom said side hole 41. Furthermore, the two shells 32, 33 provide twofurther holes 42, aligned in the two half-shells 32, 33, for receivingthe pin 16.

The casing 32, 33, consequently provides at least one side hole 41 whichis aligned with the respective horizontal holing 28, which, as alreadymentioned, is formed in the shoulder 13.

FIGS. 8 to 10 show both the insertion of the pin 16 into the barrel 26and also the blockage of the pin 16 by the movement of the grub screw 54inside the barrel by means of the blocking mechanism 30.

FIGS. 11 to 13 show a further example of a barrel for a barrel jointaccording to the present invention which applies the same innovativeconcept.

In the figures, a barrel 126 provides a body 132 having a cylindricalform, provided with an internal threading 135 in which the grub screw 29is screwed. The body 132 also provides a side hole 141, from which a tipof a screwdriver 21 passes, and two further holes 142 aligned forreceiving the pin 16.

The head of the grub screw 29 provides both a housing 100 for a tip of ascrewdriver 21 and also a peripheral toothing 101 for collaborating witha tip of a screwdriver 21.

It can therefore be seen how, in this case, it is possible to act on thegrub screw 29 in a first way, by passing, as in the previous example,from the side hole 141 in the body 132 of the barrel 126 and acting withthe tip of the screwdriver 21 on the peripheral toothing 101 of the grubscrew 29.

A further possibility is provided by the presence of an upper hole 103in the body 132 of the barrel 126 which allows a tip of a screwdriver 21to be inserted in the housing 100 of the grub screw 29 to rotate thesame.

FIGS. 14a to 16b show a further example of a barrel for a barrel jointaccording to the invention which applies the same innovative concept.

In FIGS. 14a to 16 b, a barrel 226 contains a blocking mechanism 230.The barrel 226 provides a hollow body 232 having a cylindrical form, inwhich a cylinder 43 is housed, which rotates in its interior. Thecylinder 43 provides, in an intermediate portion, a cam 44 suitable forbeing engaged with a screw having an enlarged head 45 forming part ofthe pin 215.

The cam 44 of the cylinder 43 which, as already specified, is rotatable,is produced in the form of a curved wall which forms a toothing whichextends upwards with a variable profile (FIG. 14b ).

An upper portion of the cylinder 43 contains a perimetric toothing 46,embedded with respect to the side surface of the cylinder 43, which canbe engaged by means of a star tip of a screwdriver 47 (only partiallyshown). Said toothing 46 forms actuation means for the rotation of thecam 44.

It should be noted, however, that a further activation means for therotation is present, consisting of a seat 48 formed above the cylinder43 suitable for receiving a star tip of a screwdriver 47 (only partiallyshown). Furthermore, the body 232 of the barrel 226 provides a side hole241, from which the tip of the screwdriver 47 passes, and a further hole242 from which the screw with an enlarged head 45 forming part of thepin 215, passes.

It can therefore be seen how, in this case, it is possible to act on thebarrel 226 in a first way, by passing from the side hole 241 in the body232 of the barrel 226 and acting with the tip of the screwdriver on theperipheral perimetric toothing 46 of the cylinder 43.

A further possibility is provided by the presence of an upper opening inthe body 232 of the barrel 226 which allows a tip of a screwdriver 47 tobe inserted in the housing 48 of the cylinder 43 to rotate the same.

The advantages and innovative features have thus been shown, of a barrelfor a barrel joint for parts of furniture and furnishing items accordingto the present invention.

The forms and structure for the production of a barrel for a barreljoint according to the present invention, as also the materials andassembly modes, can naturally differ from those shown for purelyillustrative and non-limiting purposes in the drawings.

The objectives mentioned in the preamble of the description havetherefore been achieved.

The protection scope of the present invention is defined by the enclosedclaims.

The invention claimed is:
 1. A barrel for a barrel joint for parts offurniture and furnishing items comprising: a hollow cylindrical bodycontaining a blocking element, the hollow cylindrical body having, on aside surface, at least one hole for receiving a pin of the barrel joint,and further having an internal threading, in which the blocking elementis screwed to operate as a grub screw, wherein the hollow cylindricalbody has at least one additional hole on the side surface, for passageof a tip of a tool adapted to act on a peripheral toothing of the grubscrew, and wherein the hollow cylindrical body further has an upper holefor passage of a tip of a screwdriver adapted to be inserted in ahousing of the grub screw.
 2. A barrel for a barrel joint for parts offurniture and furnishing items comprising: a hollow cylindrical bodycontaining a blocking element and at least one hole on a side surfacefor passage of a tip of a tool, which actuates the blocking element, thehollow cylindrical body having at least an additional hole for receivinga pin of the barrel joint, wherein the hollow cylindrical body houses acylinder, which is rotatable inside the hollow cylindrical body andwhich provides a cam in an intermediate portion, the cam being adaptedto be engaged with a screw having an enlarged head forming part of thepin of the barrel joint.
 3. The barrel for a barrel joint according toclaim 2, wherein the cam of the cylinder is shaped as a curved wall. 4.The barrel for a barrel joint according to claim 2, wherein an upperportion of the cylinder contains a perimetric toothing, embedded withrespect to the side surface of the cylinder, the perimetric toothingbeing adapted to be engaged by a star tip of a screwdriver forming anactuator for rotation of the cam.
 5. The barrel for a barrel jointaccording to claim 4, further comprising a second actuator for therotation which includes a seat formed above the cylinder and adapted toreceive a star tip of a screwdriver.